Hi, i've fitted an Apexi AVC-R boost controller to my Subaru Impreza STi v2, wondering if anybody can help me to set it up, i want to run 1 bar of boost but don't know what to set the other items on the Apexi unit to, i'm a complete novice in the situation, do i need to change my map sensor? I need people with knowledge on this, much appreciated